Sperm penetration of rat eggs in vitro after dissolution of zona pellucida by chymotrypsin.
D000818:Animals; D002467:Cell Nucleus; D002918:Chymotrypsin; D004822:Epididymis; D005260:Female; D005306:Fertilization; D066298:In Vitro Techniques; D008297:Male; D010063:Ovum; D051381:Rats; D013094:Spermatozoa; D013997:Time Factors; D014599:Uterus
D002918:Chymotrypsin